The head of an agency that oversees a steel arch bridge that collapsed Tuesday in northeastern Taiwan, killing six people, resigned on Thursday.Transportation minister Lin Chia-lung told a legislative committee that Taiwan International Ports Corp. failed to check the cables of the steel arch bridge that collapsed Tuesday at Nanfangao, a fishing township in Yilan County."Company chairman Wu Chung-rung should be held responsible," Lin said. "As for who will be his successor, we'll think about it later."The company is a state enterprise owned by the ministry.Lin said he has asked the company …READ FULL ARTICLE